function getThumbImage($filename, $width = 100, $height = 'auto', $type = 0, $replace = false)
{
$UPLOAD_URL = '';
$UPLOAD_PATH = '';
$filename = str_ireplace($UPLOAD_URL, '', $filename);
//将URL转化为本地地址
$info = pathinfo($filename);
$oldFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '.' . $info['extension'];
$thumbFile = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '_' . $width . '_' . $height . '.' . $info['extension'];
$oldFile = str_replace('\\', '/', $oldFile);
$thumbFile = str_replace('\\', '/', $thumbFile);
$filename = ltrim($filename, '/');
$oldFile = ltrim($oldFile, '/');
$thumbFile = ltrim($thumbFile, '/');
//兼容SAE的中心裁剪缩略
if (strtolower(C('PICTURE_UPLOAD_DRIVER')) == 'sae') {
$storage = new SaeStorage();
$thumbFilePath = str_replace(C('UPLOAD_SAE_CONFIG.rootPath'), '', $thumbFile);
if (!$storage->fileExists(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath)) {
$f = new SaeFetchurl();
$img_data = $f->fetch($oldFile);
$img = new SaeImage();
$img->setData($img_data);
$info_img = $img->getImageAttr();
if ($height == "auto") {
$height = $info_img[1] * $height / $info_img[0];
}
$w = $info_img[0];
$h = $info_img[1];
/* 居中裁剪 */
//计算缩放比例
$w_scale = $width / $w;
if ($w_scale > 1) {
$w_scale = 1 / $w_scale;
}
$h_scale = $height / $h;
if ($h_scale > $w_scale) {
//按照高来放缩
$x1 = (1 - 1.0 * $width * $h / $w / $height) / 2;
$x2 = 1 - $x1;
$img->crop($x1, $x2, 0, 1);
$img_temp = $img->exec();
$img1 = new SaeImage();
$img1->setData($img_temp);
$img1->resizeRatio($h_scale);
} else {
$y1 = (1 - 1 * 1.0 / ($width * $h / $w / $height)) / 2;
$y2 = 1 - $y1;
$img->crop(0, 1, $y1, $y2);
$img_temp = $img->exec();
$img1 = new SaeImage();
$img1->setData($img_temp);
$img1->resizeRatio($w_scale);
}
$img1->improve();
$new_data = $img1->exec();
// 执行处理并返回处理后的二进制数据
if ($new_data === false) {
return $oldFile;
}
// 或者可以直接输出
$thumbed = $storage->write(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath, $new_data);
$info['width'] = $width;
$info['height'] = $height;
$info['src'] = $thumbed;
//图片处理失败时输出错误码和错误信息
} else {
$info['width'] = $width;
$info['height'] = $height;
$info['src'] = $storage->getUrl(C('UPLOAD_SAE_CONFIG.domain'), $thumbFilePath);
}
return $info;
}
//原图不存在直接返回
if (!file_exists($UPLOAD_PATH . $oldFile)) {
@unlink($UPLOAD_PATH . $thumbFile);
$info['src'] = $oldFile;
$info['width'] = intval($width);
$info['height'] = intval($height);
return $info;
//缩图已存在并且 replace替换为false
} elseif (file_exists($UPLOAD_PATH . $thumbFile) && !$replace) {
$imageinfo = getimagesize($UPLOAD_PATH . $thumbFile);
$info['src'] = $thumbFile;
$info['width'] = intval($imageinfo[0]);
$info['height'] = intval($imageinfo[1]);
return $info;
//执行缩图操作
} else {
$oldimageinfo = getimagesize($UPLOAD_PATH . $oldFile);
$old_image_width = intval($oldimageinfo[0]);
$old_image_height = intval($oldimageinfo[1]);
if ($old_image_width <= $width && $old_image_height <= $height) {
@unlink($UPLOAD_PATH . $thumbFile);
@copy($UPLOAD_PATH . $oldFile, $UPLOAD_PATH . $thumbFile);
$info['src'] = $thumbFile;
$info['width'] = $old_image_width;
$info['height'] = $old_image_height;
return $info;
} else {
if ($height == "auto") {
$height = $old_image_height * $width / $old_image_width;
}
if ($width == "auto") {
$width = $old_image_width * $width / $old_image_height;
}
if (intval($height) == 0 || intval($width) == 0) {
return 0;
}
require_once 'ThinkPHP/Library/Vendor/phpthumb/PhpThumbFactory.class.php';
$thumb = PhpThumbFactory::create($UPLOAD_PATH . $filename);
if ($type == 0) {
$thumb->adaptiveResize($width, $height);
} else {
$thumb->resize($width, $height);
}
$res = $thumb->save($UPLOAD_PATH . $thumbFile);
$info['src'] = $UPLOAD_PATH . $thumbFile;
$info['width'] = $old_image_width;
$info['height'] = $old_image_height;
return $info;
//内置库缩略
/* $image = new \Think\Image();
$image->open($UPLOAD_PATH . $filename);
//dump($image);exit;
$image->thumb($width, $height, $type);
$image->save($UPLOAD_PATH . $thumbFile);
//缩图失败
if (!$image) {
$thumbFile = $oldFile;
}
$info['width'] = $width;
$info['height'] = $height;
$info['src'] = $thumbFile;
return $info;*/
}
}
}